Weight in Working Order (Engine and Tender): (varied due to different tender styles)

Fuel: Coal

General Notes:

a.

Classes P-1 through P-6 were classed as Light Pacific; classes P-7 through P-13 were classed as Heavy Pacific

b.

UP 2818, as UP 119, was displayed at the 1904 St. Louis Exposition

UP 4-6-2 -- 6 locomotives

1915 UP
Number

First
Number

Builder

Builder
Number

DateBuilt

Fuel

Date Vacated

UP 2819

UP 120

Baldwin

28534

Aug 1906

Coal

Jul 1946

UP 2820

UP 121

Baldwin

28535

Aug 1906

Coal

May 1936

UP 2821

UP 122

Baldwin

28549

Sep 1906

Coal

Dec 1933

UP 2822

UP 123

Baldwin

28550

Sep 1906

Coal

Nov 1927

UP 2823

UP 124

Baldwin

28593

Sep 1906

Coal

May 1940

UP 2824

UP 125

Baldwin

28600

Sep 1906

Oil

May 1947

Description:

CS Class: P-3

Cabside Class: P-77

Drive Wheel Diameter: 77 inches

Cylinders: 22x28 inches

Maximum Tractive Effort: 29,920 pounds

Weight on Drivers: 148,500 pounds

Weight in Working Order (Engine Only): 230,500 pounds

Weight in Working Order (Engine and Tender): (varied due to different tender styles)

Fuel: (see above)

General Notes:

a.

Classes P-1 through P-6 were classed as Light Pacific; classes P-7 through P-13 were classed as Heavy Pacific

UP 4-6-2 -- 4 locomotives

1915 UP
Number

First
Number

Builder

Builder
Number

DateBuilt

Date Vacated

UP 2825

UP 126

Baldwin

30744

Jun 1907

May 1928

UP 2826

UP 127

Baldwin

30745

Jun 1907

May 1936

UP 2827

UP 128

Baldwin

30760

Jun 1907

May 1940

UP 2828

UP 129

Baldwin

30761

Jun 1907

Dec 1937

Description:

CS Class: P-4

Cabside Class: P-77

Drive Wheel Diameter: 77 inches

Cylinders: 22x28 inches

Maximum Tractive Effort: 29,920 pounds

Weight on Drivers: 148,500 pounds

Weight in Working Order (Engine Only): 230,500 pounds

Weight in Working Order (Engine and Tender): (varied due to different tender styles)

Fuel: Coal

General Notes:

a.

Classes P-1 through P-6 were classed as Light Pacific; classes P-7 through P-13 were classed as Heavy Pacific

UP 4-6-2 -- 21 locomotives

1915 UP
Number

First
Number

Builder

Builder
Number

DateBuilt

Fuel

Date Vacated

UP 2829

UP 130

Baldwin

33642

Sep 1909

Coal

Sep 1946

UP 2830

UP 131

Baldwin

33643

Sep 1909

Oil

May 1940

UP 2831

UP 132

Baldwin

33644

Sep 1909

Coal

Dec 1933

UP 2832

UP 133

Baldwin

33645

Sep 1909

Coal

May 1936

UP 2833

UP 134

Baldwin

33646

Sep 1909

Coal

Dec 1933

UP 2834

UP 135

Baldwin

33647

Sep 1909

Coal

Dec 1933

UP 2835

UP 136

Baldwin

33674

Sep 1909

Coal

Feb 1947

UP 2836

UP 137

Baldwin

33675

Sep 1909

Coal

Dec 1930

UP 2837

UP 138

Baldwin

33676

Sep 1909

Coal

Dec 1930

UP 2838

UP 139

Baldwin

33677

Sep 1909

Coal

Dec 1933

UP 2839

UP 140

Baldwin

33681

Sep 1909

Coal

Dec 1930

UP 2840

UP 141

Baldwin

33682

Sep 1909

Coal

Aug 1929

UP 2841

UP 142

Baldwin

33683

Sep 1909

Coal

Dec 1933

UP 2842

UP 143

Baldwin

33684

Sep 1909

Coal

Dec 1936

UP 2843

UP 144

Baldwin

33685

Sep 1909

Coal

Dec 1933

UP 2844

UP 145

Baldwin

33707

Sep 1909

Oil

May 1947

UP 2845

UP 146

Baldwin

33719

Sep 1909

Coal

Oct 1927

UP 2846

UP 147

Baldwin

33720

Sep 1909

Coal

Dec 1937

UP 2847

UP 148

Baldwin

33748

Oct 1909

Coal

Dec 1933

UP 2848

UP 149

Baldwin

33749

Oct 1909

Coal

Oct 1927

UP 2849

UP 150

Baldwin

33750

Oct 1909

Coal

Oct 1928

Description:

CS Class: P-5

Cabside Class: P-77

Drive Wheel Diameter: 77 inches

Cylinders: 22x28 inches

Maximum Tractive Effort: 29,920 pounds

Weight on Drivers: 148,500 pounds

Weight in Working Order (Engine Only): 230,500 pounds

Weight in Working Order (Engine and Tender): (varied due to different tender styles)

Fuel: (see above)

General Notes:

a.

Classes P-1 through P-6 were classed as Light Pacific; classes P-7 through P-13 were classed as Heavy Pacific

b.

UP 2844, ex UP 145, is shown in the Baldwin builder record as number 33707; UP's equipment record (r3-1450) shows UP 2844 as number 33686; Gordon McCulloh's "A History of Union Pacific Steam" matches the UP record, which has been found to be in error.

UP 4-6-2 -- 10 locomotives

1915 UP
Number

First
Number

Builder

Builder
Number

DateBuilt

Date Vacated

UP 2850

UP 151

Baldwin

35958

Feb 1911

May 1940

UP 2851

UP 152

Baldwin

35959

Feb 1911

Mar 1952

UP 2852

UP 153

Baldwin

35960

Feb 1911

May 1947

UP 2853

UP 154

Baldwin

35978

Feb 1911

Feb 1947

UP 2854

UP 155

Baldwin

35979

Feb 1911

Aug 1946

UP 2855

UP 156

Baldwin

35980

Feb 1911

Aug 1946

UP 2856

UP 157

Baldwin

35986

Feb 1911

Feb 1952

UP 2857

UP 158

Baldwin

35987

Feb 1911

Aug 1946

UP 2858

UP 159

Baldwin

35988

Mar 1911

Jul 1946

UP 2859

UP 160

Baldwin

35989

Mar 1911

Aug 1946

Description:

CS Class: P-6

Cabside Class: P-77

Drive Wheel Diameter: 77 inches

Cylinders: 22x28 inches

Maximum Tractive Effort: 29,920 pounds

Weight on Drivers: 149,475 pounds

Weight in Working Order (Engine Only): 238,825 pounds

Weight in Working Order (Engine and Tender): (varied due to different tender styles)

Fuel: Coal

UP 4-6-2 -- 10 locomotives

1915 UP
Number

First
Number

Builder

Builder
Number

DateBuilt

Date
Vacated

UP 2860

UP 161

Schenectady

51598

Aug 1912

Dec 1954

UP 2861

UP 162

Schenectady

51599

Aug 1912

Dec 1947

UP 2862

UP 163

Schenectady

51600

Aug 1912

Nov 1947

UP 2863

UP 164

Schenectady

51601

Aug 1912

Aug 1952

UP 2864

UP 165

Schenectady

51602

Aug 1912

Jul 1950

UP 2865

UP 166

Schenectady

51603

Aug 1912

Feb 1952

UP 2866

UP 167

Schenectady

51604

Aug 1912

Mar 1952

UP 2867

UP 168

Schenectady

51605

Aug 1912

Feb 1952

UP 2868

UP 169

Schenectady

51606

Aug 1912

Mar 1952

UP 2869

UP 170

Schenectady

51607

Aug 1912

Mar 1952

Description:

CS Class: P-8

Cabside Class: P-77

Drive Wheel Diameter: 77 inches

Cylinders: 25x28 inches

Maximum Tractive Effort: 42,500 pounds

Weight on Drivers: 167,000 pounds

Weight in Working Order (Engine Only): 278,000 pounds

Weight in Working Order (Engine and Tender): (varied due to different tender styles)

Fuel: Coal

General Notes:

a.

Classes P-1 through P-6 were classed as Light Pacific; classes P-7 through P-13 were classed as Heavy Pacific

UP 4-6-2 -- 10 locomotives

1915 UP
Number

First
Number

Builder

Builder
Number

DateBuilt

Date Vacated

UP 2870

UP 171

Brooks

53355

May 1913

Nov 1953

UP 2871

UP 172

Brooks

53356

May 1913

Nov 1947

UP 2872

UP 173

Brooks

53357

May 1913

Dec 1947

UP 2873

UP 174

Brooks

53358

May 1913

Feb 1948

UP 2874

UP 175

Brooks

53359

May 1913

Mar 1949

UP 2875

UP 176

Brooks

53360

May 1913

Dec 1947

UP 2876

UP 177

Brooks

53361

May 1913

Oct 1947

UP 2877

UP 178

Brooks

53362

May 1913

Nov 1947

UP 2878

UP 179

Brooks

53363

May 1913

Mar 1948

UP 2879

UP 180

Brooks

53364

May 1913

Nov 1947

Description:

CS Class: P-9

Cabside Class: P-77

Drive Wheel Diameter: 77 inches

Cylinders: 25x28 inches

Maximum Tractive Effort: 42,500 pounds

Weight on Drivers: 167,000 pounds

Weight in Working Order (Engine Only): 278,000 pounds

Weight in Working Order (Engine and Tender): (varied due to different tender styles)

Fuel: Coal

General Notes:

a.

Classes P-1 through P-6 were classed as Light Pacific; classes P-7 through P-13 were classed as Heavy Pacific

UP 4-6-2 -- 20 locomotives

1915 UP
Number

First
Number

Builder

Builder
Number

DateBuilt

Fuel

Date Vacated

UP 2880

UP 181

Lima

1424

Sep 1914

Coal

Dec 1947

UP 2881

UP 182

Lima

1425

Sep 1914

Oil

Mar 1949

UP 2882

UP 183

Lima

1426

Sep 1914

Coal

May 1947

UP 2883

UP 184

Lima

1427

Sep 1914

Coal

Oct 1947

UP 2884

UP 185

Lima

1428

Sep 1914

Coal

Oct 1947

UP 2885

UP 186

Lima

1429

Sep 1914

Oil

May 1947

UP 2886

UP 187

Lima

1430

Sep 1914

Oil

May 1947

UP 2887

UP 188

Lima

1431

Sep 1914

Oil

May 1947

UP 2888

UP 189

Lima

1432

Sep 1914

Coal

Sep 1955

UP 2889

UP 190

Lima

1433

Sep 1914

Coal

Feb 1954

UP 2890

UP 191

Lima

1434

Oct 1914

Coal

Mar 1948

UP 2891

UP 192

Lima

1435

Oct 1914

Coal

Oct 1947

UP 2892

UP 193

Lima

1436

Oct 1914

Coal

May 1947

UP 2893

UP 194

Lima

1437

Oct 1914

Oil

Nov 1947

UP 2894

UP 195

Lima

1438

Oct 1914

Oil

Aug 1954

UP 2895

UP 196

Lima

1439

Oct 1914

Coal

Dec 1947

UP 2896

UP 197

Lima

1440

Oct 1914

Coal

Oct 1947

UP 2897

UP 198

Lima

1441

Oct 1914

Coal

Jan 1956

UP 2898

UP 199

Lima

1442

Oct 1914

Coal

Mar 1947

UP 2899

UP 100

Lima

1443

Oct 1914

Coal

Oct 1953

Description:

CS Class: P-10

Cabside Class: P-77

Drive Wheel Diameter: 77 inches

Cylinders: 25x28 inches

Maximum Tractive Effort: 42,500 pounds

Weight on Drivers: 167,000 pounds

Weight in Working Order (Engine Only): 278,000 pounds

Weight in Working Order (Engine and Tender): (varied due to different tender styles)

Fuel: (see above)

General Notes:

a.

Classes P-1 through P-6 were classed as Light Pacific; classes P-7 through P-13 were classed as Heavy Pacific